// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package org.apache.doris.indexpolicy;

import org.apache.doris.common.DdlException;

import com.google.common.collect.ImmutableSet;

import java.util.Map;
import java.util.Set;

public class CharReplaceCharFilterValidator extends BasePolicyValidator {
    private static final Set<String> ALLOWED_PROPS = ImmutableSet.of(
            "type", "pattern", "replacement");

    public CharReplaceCharFilterValidator() {
        super(ALLOWED_PROPS);
    }

    @Override
    protected String getTypeName() {
        return "char_replace filter";
    }

    @Override
    protected void validateSpecific(Map<String, String> props) throws DdlException {
        if (props.containsKey("pattern")) {
            String pattern = props.get("pattern");
            if (pattern != null && !pattern.isEmpty()) {
                for (int i = 0; i < pattern.length(); i++) {
                    if (pattern.charAt(i) > 255) {
                        throw new DdlException(
                                "pattern must contain only single-byte characters in [0,255]");
                    }
                }
            }
        }
        if (props.containsKey("replacement")) {
            String replacement = props.get("replacement");
            if (replacement == null || replacement.length() != 1) {
                throw new DdlException("replacement must be exactly one byte");
            }
            if (replacement.charAt(0) > 255) {
                throw new DdlException("replacement must be in [0,255]");
            }
        }
    }
}
